I’m planning to use this image as an icon for a yellow skin for Visor, unfortunately, it’s a jpg so I need the transparency (otherwise it doesn’t look very professional). Mind helping me out?
Here’s the image: http://lvlworld.com/avatar/user/1722-1419637332.jpg

Save it as .png or .tga file, and make an alpha mask.
Spearmint supports .png from very beginning (ioq3ztm) whereas everything < ioqq3ztm (Spearmint) only supports .tga, afaik, for alpha channel Icons at least.